L20
Quectel GPS Engine
EVB User Guide
L20_EVB_User_Guide_V1.0
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L20 EVB User Guide
L20_EVB_User_Guide_V1.0 - 1 -
Document Title
L20 EVB User Guide
Version
1.0
Date
2010-12-20
Status
Release
Document Control ID
L20_EVB_User_Guide_V1.0
General Notes
Quectel offers this information as a service to its customers, to support application and
engineering efforts that use the products designed by Quectel. The information provided is
based upon requirements specifically provided to Quectel by the customers. Quectel has not
undertaken any independent search for additional relevant information, including any
information that may be in the customer’s possession. Furthermore, system validation of this
product designed by Quectel within a larger electronic system remains the responsibility of
the customer or the customer’s system integrator. All specifications supplied herein are
subject to change.
Copyright
This document contains proprietary technical information which is the property of Quectel
Limited. The copying of this document, distribution to others, and communication of the
contents thereof, are forbidden without express authority. Offenders are liable to the payment
of damages. All rights are reserved in the event of a patent grant or registration of a utility
model or design. All specification supplied herein are subject to change without notice at any
time.
Copyright © Shanghai Quectel Wireless Solutions Co., Ltd. 2010
Quectel
Quectel
by the customers.
by the customers.
within a larger electronic system remains the responsibility of
within a larger electronic system remains the responsibility of
Quectel
Shanghai
Shanghai
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Contents
0. Revision History ........................................................................................................................... 5
1. Introduction ................................................................................................................................... 6
1.1. Reference ............................................................................................................................. 6
1.2. Abbreviations ...................................................................................................................... 6
2. EVB Kit Introduction .................................................................................................................... 7
2.1. EVB Top and Bottom View ................................................................................................. 7
2.2. EVB Accessories ................................................................................................................. 9
3. Interface Application ................................................................................................................... 10
3.1. Power Interface ................................................................................................................. 10
3.2. UART Interface ................................................................................................................. 11
3.3. Antenna Interface .............................................................................................................. 12
3.4. Switches ............................................................................................................................ 12
3.5. Operating Status LEDs ...................................................................................................... 13
3.6. Test Points ......................................................................................................................... 14
4. EVB and Accessories .................................................................................................................. 15
5. Starting SiRFLive ....................................................................................................................... 16
Quectel
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Table Index
TABLE 1: REFERENCE .......................................................................................................................... 6
TABLE 2: ABBREVIATIONS ................................................................................................................. 6
TAB LE 3: PINS OF UART PORT ......................................................................................................... 11
TAB LE 4: SWITCHES AND BUTTONS .............................................................................................. 13
TAB LE 5: OPERATING STATUS LEDS .............................................................................................. 13
TAB LE 6: PINS OF J102 & J104........................................................................................................... 14
Quectel
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Figure Index
FIGURE 1: EVB TOP VIEW ................................................................................................................... 7
FIGURE 2: EVB BOTTOM VIEW ......................................................................................................... 8
FIGURE 3: EVB ACCESSORIES ........................................................................................................... 9
FIGURE 4: POWER INTERFACE ........................................................................................................ 10
FIGURE 5: UART INTERFACE ........................................................................................................... 11
FIGURE 6: ANTENNA INTER FACE ................................................................................................... 12
FIGURE 7: SWITCHES ......................................................................................................................... 12
FIGURE 8: OPERATING STATUS LEDS ............................................................................................ 13
FIGURE 9: TEST POINTS J102 & J104 ............................................................................................... 14
FIGURE 10: EVB AND ACCESSORY EQUIPMENTS ....................................................................... 15
Quectel
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0. Revision History
Revision
Date
Author
Description of change
1.0 2010-12-20 Roy Chen Initial
Quectel
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1. Introduction
This document defines and specifies the usage of L20 EVB (Evaluation Board). Customer can get
useful information about L20 EVB and GPS demo tool from this document.
1.1. Reference
Table 1: Reference
SN Document name Remark
[1] L20_HD Hardware Design
1.2. Abbreviations
Table 2: Abbreviations
Abbreviation Description
C/NO Carrier/Noise
GPS
Global Positioning System
HDOP Horizontal Dilution of Precision
SV Satellite Vehicle
UART Universal Asynchronous Receiver & Transmitter
USB Universal Serial Bus
UTC Universal Time Coordinated
Quectel
NoNobal
bal
ng
ng
Universal Asynchronous Receiver &
Universal Asynchronous Receiver &
Universal Time Coordinated
Universal Time Coordinated
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2. EVB Kit Introduction
2.1. EVB Top and Bottom View
Figure 1: EVB top view
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Figure 2: EVB bottom view
A: GPS UART port
B: Antenna interface
C: Adapter interface
D: Test points
E: L20 Module
F: POWER switch
G: NC switch (Reserve for future development)
H: NC botton (Reserve for future development)
I: Indication LEDs
J: MCU UART port (no use)
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2.2. EVB Accessories
Figure 3: EVB accessories
A: GPS active antenna (3.3V)
B: Serial port cable (USB 2.0)
C: DC5V/2A power adapter
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3. Interface Application
3.1. Power Interface
Figure 4: Power interface
Quectel
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3.2. UART Interface
Figure 5: UART interface
Table 3: Pins of UART port
Pin
Signal
I/O
Description
2 TXD(RS232) O Transmit data
3
RXD(RS232)
I
Receive data
5 GND GND
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3.3. Antenna Interface
Figure 6: Antenna interface
3.4. Switches
Figure 7: Switches
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Table 4: Switches and buttons
Part Name I/O Description
S1
POWER
I
Control power supply from adapter
3.5. Operating Status LEDs
Figure 8: Operating status LEDs
Table 5: Operating status LEDs
Part Name I/O
Description
L1 GPS_TXD_DATA O
Flash: GPS Data export from TXD
Extinct: no data
L2 1PPS O TBD
Quectel
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3.6. Test Points
Figure 9: Test points J102 & J104
Table 6: Pins of J102 & J104
Pin Signal I/O Description
7
TXD1
O
Transmit GPS data
8 RXD1 I Receive GPS data
VCC
I
Supply voltage to module
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4. EVB and Accessories
The EVB and its accessories are equipped as shown in Figure 10.
Figure 10: EVB and accessory equipments
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5. Starting SiRFLive
The SiRFLive tool can help user to view the status of GPS receiver and record NMEA data. The
steps of using SiRFLive for L20 are described as below:
1. After finishing assembling the EVB as figure 10, connect the RS232 to USB cable to PC, and
power on the module, the LED GPS_TXD_DATA will be flash. The operation window of
SiRFLive is shown below:
2. Click the button
to select COM port and baud rate 4800 in pop-up window:
Quectel
button
button
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3. The operation window will show NMEA data, Signal view, Radar view, Location map and
Position information including UTC, latitude, longitude, altitude, HDOP, speed and so on.
4. Click button , the reset window will pop up as below:
pop up as below:
pop up as below:
Quectel
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5. Select reset mode and click “Send” to implement Cold Start, Warm Start or Hot Start.
Save NMEA data with below toolbar:
6. Record log and Stop log with below menu:
Quectel
Shanghai Quectel Wireless Solutions Co., Ltd.
Room 501, Building 9, No.99, Tianzhou Road, Shanghai, China 200233
Tel: +86 21 5108 2965
Mail: info@quectel.com
sales@eddywireless.com
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